MPI_File_iread_at - Performs a nonblocking read using an
       explict offset


SYNOPSIS

       C:

            #include "mpi.h"

            int MPI_File_iread_at(MPI_File fh, MPI_Offset offset,
            void *buf, int count, MPI_Datatype datatype,
            MPIO_Request *request)

       Fortran:

            INCLUDE "mpif.h" (or USE MPI)

            <type> BUF(*)
            INTEGER fh, count, datatype, request, ierror
            INTEGER(KIND=MPI_OFSET_KIND) offset

            CALL MPI_FILE_IREAD_AT(fh, offset, buf, count,
            datatype, request, ierror)


DESCRIPTION

       MPI_File_iread_at is a nonblocking version of the
       MPI_File_read_at interface.

       MPI_File_iread_at accepts the following arguments:

       fh        Specifies the file handle (handle)

       offset    Specifies the file offset (nonnegative integer)

       count     Specifies the number of elements in the buffer
                 (nonnegative integer)

       datatype  Specifies the datatype of each buffer element
                 (handle)

       buf       Returns the initial address of the buffer
                 (choice)

       request   Returns the request object (handle)

       ierror    Specifies the return code value for successful
                 completion, which is in MPI_SUCCESS.
                 MPI_SUCCESS is defined in the mpif.h file.

   Limitations
       In Fortran and C, the routines MPIO_Wait and MPIO_Test
       must be used instead of MPI_Wait and MPI_Test,

       change in an upcoming release.

   Notes for Fortran
       All MPI objects (for example, MPI_Datatype, MPI_Comm,
       MPI_File) are of type INTEGER.


SEE ALSO

       MPI_File_open(3), MPI_File_read_at(3), MPI_IO(3)


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